WO2011135293A2 - Alimentation électrique d'une station de base de télécommunications - Google Patents

Alimentation électrique d'une station de base de télécommunications Download PDF

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Publication number
WO2011135293A2
WO2011135293A2 PCT/GB2011/000644 GB2011000644W WO2011135293A2 WO 2011135293 A2 WO2011135293 A2 WO 2011135293A2 GB 2011000644 W GB2011000644 W GB 2011000644W WO 2011135293 A2 WO2011135293 A2 WO 2011135293A2
Authority
WO
WIPO (PCT)
Prior art keywords
power supply
generator set
base station
supply apparatus
power
Prior art date
Application number
PCT/GB2011/000644
Other languages
English (en)
Other versions
WO2011135293A3 (fr
Inventor
Jawad Al-Tayie
Robert Seliga
Sitaram Ganeshan
Simon David Lount
Richard Mark Hardy
Emil Ernest
Rauf Abdul Sattar
Original Assignee
Cummins Generator Technologies Limited
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Cummins Generator Technologies Limited filed Critical Cummins Generator Technologies Limited
Priority to GB1217958.6A priority Critical patent/GB2492690B/en
Publication of WO2011135293A2 publication Critical patent/WO2011135293A2/fr
Publication of WO2011135293A3 publication Critical patent/WO2011135293A3/fr

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
    • H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
    • H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
    • H02J9/08—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems requiring starting of a prime-mover
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B10/00—Integration of renewable energy sources in buildings
    • Y02B10/70—Hybrid systems, e.g. uninterruptible or back-up power supplies integrating renewable energies
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
    • Y04S20/20—End-user application control systems

Definitions

  • the present invention relates to a power supply for a telecommunications (telecom) base station.
  • the present invention relates to a power supply which can provide a back-up source of power in the event of a failure of the main power supply to the base station.
  • Telecommunications base stations usually have their power supplied from the electrical grid mains. In some cases back up power is supplied from a stand-by generator set. Some telecommunication sites rely entirely on a generator set as no grid mains is available. Where a generator set is employed, depending on the size of the installation, the rating is generally between 7.5kVA and " lOOkVA.
  • telecommunications base station electrical loads comprise air-conditioning, switch mode power supply (SMPS), battery banks, base transceiver (BTS) units, transmitter equipment (Tx) and lighting.
  • SMPS switch mode power supply
  • BTS base transceiver
  • Tx transmitter equipment
  • Telecommunications generator sets are usually over-sized to cope with the transient demand of air-conditioning systems and to provide short and rapid charging for battery banks. Duty cycles of the generator set vary depending on the equipment installed and whether a mains supply is present and how reliable it is.
  • a synchronous field generator set consisting of a wound field generator driven by a reciprocating internal combustion engine.
  • the generator is equipped with a controllable excitation system that provides substantially constant terminal voltage over a wide range of leading or lagging power factors.
  • the frequency is stabilised by the speed governor of the engine.
  • the engine is usually a diesel engine and the speed is usually fixed at 1500 or 1800 rpm to provide a 50 or 60 Hz output frequency.
  • Existing generator sets for telecommunications base stations tend to be inefficient due to their fixed speed operation and the need to be over-sized to cope with transient loads.
  • the power supply apparatus for a telecommunications base station, the power supply apparatus comprising:
  • the standby generator set is a variable speed generator set
  • the conversion means is operable to convert an output of the variable speed generator set to a substantially constant DC voltage to supply the DC bus when the base station is powered by the variable speed generator set.
  • the present invention may provide the advantage that the speed of the engine can be varied to match variations in the load demand, while supplying a DC load in the base station. This can allow the engine to be operated at optimal speed for the demanded load. This can lead to increases in efficiency and fuel saving and reduce the overall size and weight of the generator set. Furthermore, the same converter which is used to convert the mains power supply to a DC voltage can also be used to convert the variable output of the generator set to a substantially constant DC voltage. This can allow a single converter to be used, reducing the size and cost of the system.
  • An irregularity in the mains power supply may be loss of the mains power supply, or any other abnormality such as voltage drop.
  • the conversion means is operable to convert a variable voltage, variable frequency output of the variable speed generator set to a substantially constant DC voltage to supply the DC bus.
  • the power supply apparatus may further comprise control means for controlling operation of the conversion means in dependence on the power demand of the base station when the base station is powered by the variable speed generator set.
  • the conversion means comprises a plurality of switched mode power supplies. At least some of the switched mode power supplies may be existing switched mode power supplies in the base station, although additional switched mode power supplies may be provided to account for variations in the output voltage of the generator set.
  • the switched mode power supplies may be connected in parallel, and at least one of the switched mode power supplies may be connected and disconnected as the power demand of the base station changes. For example, at low power fewer switched mode power supplies may be connected than at high power.
  • a distributor may be provided for distributing power from the mains power supply or the variable speed generator set to the plurality of switched mode power supplies. For example, the distributor may be arranged to control the distribution of power to the switched mode power supplies in dependence on the power demand of the base station.
  • the switched mode power supplies include a voltage regulator. This may assist in converting the variable output of the generator set to a substantially constant DC voltage.
  • the conversion means comprises an AC/DC converter comprising a rectifier and a buck or boost circuit.
  • the converter may replace the switched mode power supplies which would otherwise be present in the power supply apparatus.
  • the converter further comprises a voltage regulator for regulating the output of the buck or boost circuit. This may assist in converting the variable output of the generator set to a substantially constant DC voltage.
  • the power supply apparatus may further comprise an inverter for converting the DC bus voltage to an AC output voltage. In this case the inverter is connected to the DC bus. This arrangement can allow the variable speed generator set to provide an AC output of substantially constant voltage and/or frequency, via the DC bus and inverter.
  • the power supply apparatus comprises an AC/AC converter operable to convert the variable voltage output of the variable speed generator set directly to a substantially constant AC output voltage.
  • the AC/AC converter may be a cycloconverter, such as that described in United Kingdom patent application number GB 2 450 891.
  • the AC/AC converter may be an IGBT (insulated gate bipolar transistor) based PW (pulse width modulation) converter, or any other converter capable of converting from one AC voltage to another.
  • the AC/AC converter is also capable of converting from one frequency to another.
  • the AC/AC converter is operable to convert a variable voltage, variable frequency output of the variable speed generator set to a substantially constant AC voltage and/or frequency, or to an AC voltage and/or frequency which are variable in dependence on the requirements of the AC load.
  • the AC/AC converter may be connected in parallel with an AC/DC converter, and may be supplied with either the mains power or the output of the generator set (depending on which is supplying the power to the base station).
  • the AC/DC converter may supply the DC bus, while the AC/AC converter may convert the variable output of the variable speed generator set directly to the voltage and/or frequency required by the AC components in the base station.
  • Such an arrangement may simplify the connections which need to be made by the consumer, making the apparatus easier to install.
  • the AC/AC converter may be operable to convert the variable voltage and frequency AC output of the generator set to the same voltage and frequency as the AC mains. This may allow the output of the generator set and AC/AC converter simply to replace the mains power when the mains power has failed.
  • the converter may consist of switched mode power supplies usually present in the unit.
  • the power supply apparatus may further comprise means for synchronising the output of the AC/AC converter with the mains power supply, in order to allow parallel operation, or to facilitate the handover from one to the other.
  • the power supply apparatus may further comprise one or more batteries connectable to the DC bus.
  • the batteries may be arranged to supply power to the DC bus when an irregularity in the mains supply is first detected. If the mains fault is intermittent, this can allow the batteries to supply the DC bus for a short period without the need for the generator set, or can allow time for the generator set to start and come up to speed.
  • the batteries may provide a backup source of power when the variable speed generator set needs to increase its speed to meet an increase in load demand. This can help to maintain the DC bus at a substantially constant voltage.
  • the batteries are chargeable from the DC bus.
  • a charge/discharge unit may be provided which charges the batteries from the DC bus when there is sufficient power from the main power supply (mains or generator set), and manages the supply of power from the batteries to the DC bus when there is insufficient power from the main power supply.
  • the power supply apparatus may further comprise means for connecting a renewable energy source directly to the DC bus.
  • the renewable energy source has its own converter which is connected directly to the DC bus.
  • the power supply apparatus may further comprise a speed controller operable to control the speed of the variable speed generator set in dependence on the power demand of the base station. In this way the speed of the generator set may be controlled such that it operates at or close to the most efficient speed for the demanded power.
  • the power supply apparatus may further comprise means for sensing the power demand and feeding the sensed power demand to the speed controller.
  • the speed controller may be integrated with control means for controlling operation of the conversion means. This can allow, for example, the amount of boost to be adjusted in accordance with adjustments to the speed of the generator set, which may improve the overall control mechanism. This arrangement may also allow algorithms such as load anticipation to be used.
  • the power supply apparatus may further comprise means for switching power for the base station from the mains power supply to the standby generator set on detection of an irregularity in the mains power supply.
  • a combination of the AC mains power supply and the generator set may be used to power the base station.
  • the standby generator set preferably comprises a generator and a prime mover.
  • the generator may be a permanent magnet generator, or a synchronous field generator. In a preferred embodiment, the generator is an axial flux permanent magnet alternator, although other types of generator may be used instead.
  • the mains supply and/or the generator set may be single phase, three phase, or any other appropriate number of phases.
  • the prime mover may be an internal combustion engine such as a diesel engine.
  • torque and fuel consumption maps of the engine are programmed into an electronic speed governor for load adaptive speed control.
  • a telecommunications base station comprising a power supply apparatus in any of the forms described above.
  • the telecommunications base station preferably comprises at least one DC load connected to the DC bus.
  • power supply apparatus which supplies power to telecommunications base station, the power supply apparatus comprising:
  • a converter which converts the AC mains power supply to a DC voltage; a DC bus which supplies DC power to at least one DC load in the base station;
  • a detection unit which detects an irregularity in the mains power supply
  • a switching unit which switches power for the base station from the mains power supply to the standby generator set on detection of an irregularity in the mains power supply
  • the standby generator set is a variable speed generator set
  • the converter is operable to convert an output of the variable speed generator set to a substantially constant DC voltage to supply the DC bus when the base station is powered by the variable speed generator set.
  • the method comprising:
  • At least part of the conversion means may be an existing converter in the base station.
  • Figure 1 shows a first embodiment of a power supply apparatus for a telecommunications base station
  • Figure 2 shows parts of a switched mode power supply
  • Figure 3 shows a second embodiment of a power supply apparatus
  • Figure 4 shows a third embodiment of a power supply apparatus
  • FIG. 5 shows parts of an AC/DC converter
  • Figure 6 shows a fourth embodiment of a power supply apparatus
  • Figure 7 shows a fifth embodiment of a power supply apparatus
  • Figure 8 shows a sixth embodiment of a power supply apparatus.
  • Figure 1 shows a first embodiment of a power supply apparatus for a
  • the apparatus comprises terminals 12 for receiving power from a mains power supply 10, a mains failure detection and switch-over unit 14, a distribution board 16, and a plurality of switched mode power supplies 18 for supplying a DC bus 20.
  • the DC bus 20 is used to supply DC power to parts of the telecommunications base station, such as transmitter equipment 22, base transceiver unit 24, and battery banks 26.
  • the DC bus 20 also supplies power to an inverter 28, which converts the DC bus voltage to an AC voltage for supply to air conditioning 30 and lighting 32.
  • the DC bus voltage is 48V. However it will be appreciated that any suitable bus voltage could be used.
  • Figure 1 shows an inverter with a rating of 3kW
  • the inverter will be rated in accordance with the expected power demand of the equipment it is to supply, and any suitable rating could be used.
  • an interface is used in the distribution board to direct the mains power to the AC loads, and the air conditioning and lighting are supplied directly from the mains when mains power is being used.
  • the power supply apparatus of Figure 1 also comprises a variable speed generator set 34 comprising an engine 36, a permanent magnet alternator 38 and a speed controller 40.
  • the variable speed generator set may any suitable generator set, such as that described in International patent application number WO 01/56133, the contents of which are incorporated herein by reference.
  • a master controller 42 is provided to control the operation of the switched mode power supplies 18 and the distribution board 16. Although not shown in Figure 1 , the master controller 42 and the speed controller 40 may be linked, or may be part of the same control unit. In normal operation, power for the telecommunications base station is supplied from the mains power supply 10.
  • the distribution board 16 distributes the mains power to the switched mode power supplies 18.
  • the switched mode power supplies 18 are connected in parallel, and convert the AC mains voltage to a regulated DC voltage for supply to the DC bus 20.
  • Five switched mode power supplies are shown by way of illustration in Figure 1 , but in practice any number could be used, depending on the power ratings of the switched mode power supplies and the power requirements of the telecommunications base station.
  • mains failure detection and switchover unit 14 If a failure or abnormality occurs in the mains power supply, this is detected by the mains failure detection and switchover unit 14. In this case, power for the base station is switched from the mains supply 10 to the generator set 34. This may involve starting the engine 36 and bringing it up to the speed necessary to generate the required power. While this is happening, power may be supplied to the DC bus 20 by the battery banks 26. At other times, the battery banks are charged from the DC bus.
  • the speed of the engine 36 is varied so that it operates at optimum efficiency for the demanded power.
  • the power drawn from the DC bus 20 is sensed by power sensor 44 (consisting of a voltage sensor and current sensor) and fed back to the speed controller 40.
  • the speed controller produces an analogue or digital speed signal which is in turn used by the engine electronic governor to actuate the speed of the engine 36.
  • the speed of the engine 36 is varied accordingly.
  • the power output of the generator 38 could be sensed, as shown by the dotted line.
  • the output of the variable speed generator set 34 is a variable voltage, variable frequency output.
  • the switched mode power supplies 18 are operated to convert the variable frequency, variable voltage output of the generator set to a regulated DC voltage for the DC bus 20.
  • the switched mode power supplies are monitored by the master controller 42, and switched on and off as power demand changes.
  • the power at the DC bus is monitored in order to determine how many SMPS's are required.
  • the distribution board is used to distribute power to those SMPS's which are switched on.
  • the arrangement described above can provide fuel savings, reduced size, lower weight, a smaller package and compact generator set foot print. Furthermore the use of multiple SMPS's provides redundancy and can ensure that the power required by the telecommunications equipment is still supplied even if one or more SMPS unit should fail.
  • speed controller 40 and master controller 42 could be linked, for example to provide load anticipation capability.
  • the inverter 28 can allow AC power to be made available for the lighting and air conditioning loads 30, 32. If DC lighting is used and no air conditioning is required or has its own control electronics, the inverter may not be needed.
  • Figure 2 shows parts of a switched mode power supply 18 for use in the arrangement of Figure 1.
  • the switched mode power supply comprises a rectifier 46, chopper circuit 48, chopper control circuit 50, and output filter 52.
  • the rectifier 46 receives the AC power supply from either the mains 10 or the generator set 34, and converts it to an unregulated DC voltage.
  • the rectifier 46 also includes a power factor correction (PFC) circuit.
  • the unregulated DC output of the rectifier 46 is converted to a regulated DC voltage by the chopper circuit 48 and chopper control circuit 50.
  • the chopper circuit may be a boost circuit or buck circuit, as appropriate.
  • the regulated DC voltage is filtered by filter 52, and output for supply to the DC bus 20 in Figure 1.
  • Figure 3 shows a second embodiment of a power supply apparatus for a
  • the arrangement of Figure 3 uses a renewable energy source 54, such as wind, solar and hydro power, in addition to the mains power supply 10 or the generator set 34.
  • the output of the renewable energy source is integrated directly on to the common DC bus 20 as shown in Figure 3.
  • the renewable energy source has its own converter which allows it to connect directly to the DC bus. In this way the energy supplied by the renewable energy source can supplement the main power supply regardless of whether it comes from the mains or the generator set.
  • the renewable source 54 can be used continuously to supply power to the common DC bus.
  • the renewable source may complement both mains and generator set power. This scheme will deliver greater fuel savings and contribute to reducing greenhouse gases.
  • a renewable energy source as shown in Figure 3 can also be used with any of the other embodiments described herein.
  • Figure 4 shows a third embodiment of a power supply apparatus for a
  • a wide-range AC/DC converter 60 is used in place of the switched mode power supplies of the previous embodiments.
  • the input to the AC/DC converter 60 can be delivered by the mains supply 10 or the generator set 34.
  • the AC/DC converter needs to be capable of accepting the variable voltage, variable frequency output of the generator set, and converting it to a substantially constant DC voltage for supply to the DC bus 20.
  • the converter 60 may have an input voltage range of 80 to 270 Vrms (single or three phase) and an input frequency range of 50 - 400 Hz.
  • the engine speed controller measures the power on the common DC bus using a single current sensor.
  • the current sensor can be a Hall Effect device, a simple shunt resistor or any other current sensing device. In some circumstances it may also be desirable to sense the DC bus voltage, in order to compensate for any voltage drop. However in many situations there will be a large battery bank which will minimise voltage variations, allowing a single current sensor to be used.
  • Figure 5 shows parts of the AC/DC converter 60 in the arrangement of Figure 4.
  • the AC/DC converter comprises a rectifier 62, buck converter circuit 64, and buck converter controller 66.
  • the rectifier 62 receives the AC power supply from either the mains supply 10 or the generator set 34, and converts it to an unregulated DC voltage.
  • the unregulated DC output of the rectifier is stepped down and regulated by the buck converter circuit 64 and controller 66, to produce a regulated DC voltage for supply to the DC bus.
  • the buck converter circuit 64 may comprise an inductor and a switch, and the controller 66 may vary the duty cycle of the switch to maintain the DC output voltage at a substantially constant value (for example, 48V).
  • Figure 6 shows a fourth embodiment of a power supply apparatus for a
  • a wide range AC/DC converter 60 and an AC/AC converter 62 are incorporated within the same enclosure, to provide a single power converter unit 64.
  • the AC/ AC converter 62 is operated in parallel with the AC/DC converter 60, with the AC/DC converter 60 supplying the DC bus 20, and the AC/AC converter 62 supplying the air conditioning unit 30 and lighting 32. This arrangement simplifies the connections that need to be made by the customer.
  • the AC/DC converter 60 may be as described above with reference to Figures 4 and 5.
  • the AC/AC converter 62 may be an IGBT (insulated gate bipolar transistor) based PW (pulse width modulation) converter.
  • the AC/AC converter may be a cycloconverter, as described in UK patent application number GB 2 450 891 , the contents of which are incorporated herein by reference.
  • the AC/AC converter input can either be provided by the mains supply 10 or the generator set 34.
  • an inverter may be incorporated within the enclosure 64 instead of the AC/AC converter.
  • the inverter may be supplied from the output of the AC/DC converter 60.
  • power is measured directly from the terminals of the generator 38, or from within the power converter 64, and is sent to the speed controller 40. This simplifies the connection and makes the system more attractive from a consumer's point of view.
  • Figure 7 shows a fifth embodiment of a power supply apparatus for a
  • an AC/AC converter 66 is incorporated with the engine 36 and generator 38.
  • the AC/AC converter 66 modifies the variable amplitude and frequency of the generator 38 to a fixed output voltage, which may be a single phase or a three phase. Power is measured from the AC/AC converter and sent to the speed controller 40 to control the speed of the engine 36.
  • the AC/AC converter 66 may be a cycloconverter, as described in GB 2 450 891.
  • FIG. 7 allows a back up generator unit 68 with a fixed AC output voltage to be provided. This simplifies the integration of the back up generator unit into the telecommunications power supply system, while taking full advantage of variable speed operation.
  • An advantage of this scheme is that the system may be retrofitted to an existing installation and the original SMPS devices 70 can be left in position without any need for modification.
  • Figure 8 shows a sixth embodiment of a power supply apparatus for a
  • an AC/DC converter 72 is incorporated with the engine 36 and generator 38.
  • the variable voltage and frequency of the generator 38 is modified by the AC/DC converter 72 to a fixed DC voltage.
  • a variable speed generator set 74 is provided which produces a DC voltage which can be fed directly to the telecommunications equipment.
  • the mains supply can be fed to the AC/DC converter 72.
  • an interface 76 is provided between the mains supply 10 and the input of the AC/DC converter, to control the supply of power.
  • a variable speed generator set is used as the back-up power supply for a telecommunications power supply apparatus.
  • the mains supply and the generator set may be single phase or three phase.
  • An axial flux permanent magnet alternator (PMA) is used instead of a synchronous field generator.
  • the speed of the engine is varied to match the variations in the load demand.
  • the torque and the fuel consumption maps of the engine are programmed into the electronic speed governor for load adaptive speed control.
  • the package of the generator set can be optimized to give the best envelop to suit the available space.

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  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Devices For Supply Of Signal Current (AREA)
  • Control Of Eletrric Generators (AREA)

Abstract

Cette invention se rapporte à un appareil d'alimentation électrique d'une station de base de télécommunications. L'appareil d'alimentation électrique comprend : des moyens destinés à recevoir une alimentation électrique secteur en courant alternatif (10); des moyens de conversion (18; 60; 70; 72) destinés à convertir l'alimentation électrique secteur en courant alternatif en une tension continue; un bus à courant continu (20) destiné à fournir une alimentation en courant continu à au moins une charge continue (22, 24) dans la station de base; et un groupe électrogène de secours (34). Des moyens (14) sont prévus de façon à détecter une irrégularité de l'alimentation électrique secteur, et l'alimentation électrique de la station de base est fournie par le groupe électrogène de secours lors de la détection d'une irrégularité de l'alimentation électrique secteur. Le groupe électrogène de secours (34) est un groupe électrogène à vitesse variable, et les moyens de conversion sont conçus pour convertir une sortie du groupe électrogène à vitesse variable en une tension continue sensiblement constante de façon à alimenter le bus à courant continu lorsque la station de base est alimentée par le groupe électrogène à vitesse variable.
PCT/GB2011/000644 2010-04-30 2011-04-26 Alimentation électrique d'une station de base de télécommunications WO2011135293A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1217958.6A GB2492690B (en) 2010-04-30 2011-04-26 Power supply for telecom base station

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB1007343.5 2010-04-30
GBGB1007343.5A GB201007343D0 (en) 2010-04-30 2010-04-30 Power supply for an electrical unit

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WO2011135293A2 true WO2011135293A2 (fr) 2011-11-03
WO2011135293A3 WO2011135293A3 (fr) 2012-01-19

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020094259A1 (fr) * 2018-11-06 2020-05-14 Telefonaktiebolaget Lm Ericsson (Publ) Procédés, appareil et supports lisibles par machine pour réduire des pannes d'alimentation dans un réseau de communication

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001056133A1 (fr) 2000-01-28 2001-08-02 Newage International Limited Systeme generateur de courant alternatif
GB2450891A (en) 2007-07-10 2009-01-14 Cummins Generator Technologies Cycloconverter

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2762456B1 (fr) * 1997-04-21 1999-05-28 Alsthom Cge Alcatel Systeme et procede d'alimentation en energie electrique d'equipements electroniques
US6700214B2 (en) * 2000-02-14 2004-03-02 Aura Systems, Inc. Mobile power generation system
WO2009002818A1 (fr) * 2007-06-22 2008-12-31 Mku Cyprus Ltd. Système de conditionnement de l'énergie
US8987939B2 (en) * 2007-11-30 2015-03-24 Caterpillar Inc. Hybrid power system with variable speed genset

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001056133A1 (fr) 2000-01-28 2001-08-02 Newage International Limited Systeme generateur de courant alternatif
GB2450891A (en) 2007-07-10 2009-01-14 Cummins Generator Technologies Cycloconverter

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020094259A1 (fr) * 2018-11-06 2020-05-14 Telefonaktiebolaget Lm Ericsson (Publ) Procédés, appareil et supports lisibles par machine pour réduire des pannes d'alimentation dans un réseau de communication

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GB2492690A (en) 2013-01-09
GB201217958D0 (en) 2012-11-21
WO2011135293A3 (fr) 2012-01-19
GB201007343D0 (en) 2010-06-16
GB2492690B (en) 2014-04-02

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